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Some Techniques for Isolating and Using Short-Lived Radioisotopes; Quelques Methodes d'Isolement et d'Utilisation des Radioisotopes a Courte Periode; НЕКОТОРЫЕ МЕТОДЫ ПОЛУЧЕНИЯ И ИСПОЛЬЗОВАНИЯ КОРОТКОЖИВУЩИХ ИЗОТОПОВ; Algunas Tecnicas de Aislamiento y Empleo de Radioisotopos de Periodo Corto

Abstract

Radioisotopes of a large number of elements have been used extensively at Oak Ridge National Laboratory in ion exchange,solubility and other physical-chemical studies. The use of short-lived radioisotopes in such studies has necessitated development not only of rapid methods of preparing and purifying radioisotopes but also of special techniques for obtaining pertinent information in a relatively short time, often within a few minutes. Some recently-developed methods are described for preparing and purifying short-lived isotopes, particularly those originating from neutron-irradiated materials, including fissionable elements. The latter, of course, are convenient sources of a number of useful short-lived radioisotopes, e. g., Mo{sup 99}, Te{sup 132}, and methods are described for rapidly isolating these and other fission products in a earner-free state by ion exchange. Methods of separating short-lived daughter activities from long-lived parents by 'milking' techniques, in which the parent is strongly adsorbed on organic or inorganic ion exchange materials, are also described and typical examples discussed, for example, milking of 1.7-h In{sup 113} (from Sn{sup 113}) and 2.6-min Ba{sup 137} (from Cs{sup 197}). Two applications involving the use of short-lived tracers in chemical studies are described. The first is a ''packed bed'' technique for rapidly measuring the solubilities of sparingly soluble  More>>
Authors:
Nelson, F.; Kraus, K. A. [1] 
  1. Chemstry Division, Oak Ridge National Laboratory, Oak Ridge, TN (United States)
Publication Date:
Mar 15, 1963
Product Type:
Conference
Resource Relation:
Conference: Seminar on the Practical Applications of Short-Lived Radioisotopes Produced in Small Research Reactors, Vienna (Austria), 5-9 Nov 1962; Other Information: 19 refs., 16 figs.; Related Information: In: Production and Use of Short-Lived Radioisotopes from Reactors Vol. I. Proceedings of a Seminar on the Practical Applications of Short-Lived Radioisotopes Produced in Small Research Reactors| 448 p.
Subject:
07 ISOTOPES AND RADIATION SOURCES; BARIUM 137; DIFFUSION; FISSION PRODUCTS; INDIUM 113; IRRADIATION; LANTHANUM FLUORIDES; MOLYBDENUM 99; POROUS MATERIALS; SOLUTIONS; TELLURIUM 132; TIN 113
OSTI ID:
22173497
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M4238127954
Submitting Site:
INIS
Size:
page(s) 191-212
Announcement Date:
Dec 13, 2013

Citation Formats

Nelson, F., and Kraus, K. A. Some Techniques for Isolating and Using Short-Lived Radioisotopes; Quelques Methodes d'Isolement et d'Utilisation des Radioisotopes a Courte Periode; НЕКОТОРЫЕ МЕТОДЫ ПОЛУЧЕНИЯ И ИСПОЛЬЗОВАНИЯ КОРОТКОЖИВУЩИХ ИЗОТОПОВ; Algunas Tecnicas de Aislamiento y Empleo de Radioisotopos de Periodo Corto. IAEA: N. p., 1963. Web.
Nelson, F., & Kraus, K. A. Some Techniques for Isolating and Using Short-Lived Radioisotopes; Quelques Methodes d'Isolement et d'Utilisation des Radioisotopes a Courte Periode; НЕКОТОРЫЕ МЕТОДЫ ПОЛУЧЕНИЯ И ИСПОЛЬЗОВАНИЯ КОРОТКОЖИВУЩИХ ИЗОТОПОВ; Algunas Tecnicas de Aislamiento y Empleo de Radioisotopos de Periodo Corto. IAEA.
Nelson, F., and Kraus, K. A. 1963. "Some Techniques for Isolating and Using Short-Lived Radioisotopes; Quelques Methodes d'Isolement et d'Utilisation des Radioisotopes a Courte Periode; НЕКОТОРЫЕ МЕТОДЫ ПОЛУЧЕНИЯ И ИСПОЛЬЗОВАНИЯ КОРОТКОЖИВУЩИХ ИЗОТОПОВ; Algunas Tecnicas de Aislamiento y Empleo de Radioisotopos de Periodo Corto." IAEA.
@misc{etde_22173497,
title = {Some Techniques for Isolating and Using Short-Lived Radioisotopes; Quelques Methodes d'Isolement et d'Utilisation des Radioisotopes a Courte Periode; НЕКОТОРЫЕ МЕТОДЫ ПОЛУЧЕНИЯ И ИСПОЛЬЗОВАНИЯ КОРОТКОЖИВУЩИХ ИЗОТОПОВ; Algunas Tecnicas de Aislamiento y Empleo de Radioisotopos de Periodo Corto}
author = {Nelson, F., and Kraus, K. A.}
abstractNote = {Radioisotopes of a large number of elements have been used extensively at Oak Ridge National Laboratory in ion exchange,solubility and other physical-chemical studies. The use of short-lived radioisotopes in such studies has necessitated development not only of rapid methods of preparing and purifying radioisotopes but also of special techniques for obtaining pertinent information in a relatively short time, often within a few minutes. Some recently-developed methods are described for preparing and purifying short-lived isotopes, particularly those originating from neutron-irradiated materials, including fissionable elements. The latter, of course, are convenient sources of a number of useful short-lived radioisotopes, e. g., Mo{sup 99}, Te{sup 132}, and methods are described for rapidly isolating these and other fission products in a earner-free state by ion exchange. Methods of separating short-lived daughter activities from long-lived parents by 'milking' techniques, in which the parent is strongly adsorbed on organic or inorganic ion exchange materials, are also described and typical examples discussed, for example, milking of 1.7-h In{sup 113} (from Sn{sup 113}) and 2.6-min Ba{sup 137} (from Cs{sup 197}). Two applications involving the use of short-lived tracers in chemical studies are described. The first is a ''packed bed'' technique for rapidly measuring the solubilities of sparingly soluble salts which have been tagged with tracers. Some recent results obtained by the method on the solubility of LaF{sub 3} in HCl and HCIO{sub 4} solutions are described. The second is a rapid method for measuring diffusion coefficients in liquid systems. Thin, porous porcelain frits are saturated with solution containing a radioisotope, then rapidly eluted with solution not containing tracer. Diffusion coefficients may be calculated from the decrease of counting rate of the frit with time,after calibration with a material of known diffusion rate. Because of the short diffusion path used, die measurements may be completed in substantially less time by this method than by conventional techniques, for example diaphragm cell or capillary tube methods. (author) [French] Un grand nombre de radioisotopes sont largement utilises au Laboratoire national d'Oak Ridge pour des recherches physico-chimiques, notamment sur les echanges d'ions et la solubilite. L'emploi de radioisotopes a courte periode pour ces travaux a necessite la mise au point non seulement de methodes de preparation et de purificationaccelerees, mais aussi de techniques speciales permettant d'obtenir des informations valables dans un temps relativement court, souvent de l'ordre de quelques minutes. Les auteurs decrivent certaines methodes nouvelles de preparation et de purification d'isotopes Inverted-Question-Mark courte penoue, notamment d'isotopes qui proviennent de matieres irradiees par les neutrons, et en particulier d'elements fissiles. Ces derniers permettent evidemment d'obtenir facilement plusieurs radioisotopes Inverted-Question-Mark courte periode tres utiles, par exemple {sup 99}Mo et {sup 132}Te. Le memoire expose les methodes qui permettent d'isoler ces corps, ainsi que d'autres produits de fission par echange d'ions, sans entraineur; il decrit aussi la separation des produits de filiation a courte periode de leurs ascendants a longue periode par des procedes de ' mulsion ' qui consistent Inverted-Question-Mark adsorber fortement l'ascendant sur des echangeurs d'ions organiques ou mineraux; des exemples typiques sont examines: mulsion de {sup 113}Sn pour en extraire {sup 113}In (1,7 h) et de {sup 137}Cs pour en extraire {sup 137}Ba (2,6 min). Les auteurs decrivent deux applications comportant l'emploi d'indicateurs courte periode pour des recherches chimiques. La premiere permet de mesurer rapidement les solubilites de sels moderement solubles qui ont ete marquees a l'aide d'un indicateur (methode de la ' couche compacte ' ; les auteurs indiquent les resultats obtenus recemment Inverted-Question-Mark l'aide de cette methode pour la mesure de la solubilite de LaF{sub 3} dans des solutions d'acide chlorhydrique et d'acide perchlorique. La deuxieme est une methode rapide pour la mesure des coefficients de diffusion dans des systemes liquides. De minces frittes de porcelaine poreuse sont saturees avec une solution contenant un radioisotope, puis rapidement eluees avec une solution necontenantpasd'indica- teur. On peut calculer les coefficients de diffusion d'apres la diminution du taux de comptage de la fritte avec le temps, apres etalonnage avec une matiere dont on connait la vitesses de diffusion. En raison du court chemio de diffusion utilise, les mesures peuvent etre faites en un laps de temps relativement plus court que par les methodes classiques (cellule a diaphragme ou tube capillaire). (author) [Spanish] En el Oak Ridge National Laboratory se vienen utilizando frecuentemente radioisotopos de muchos elementos para llevar a cabo estudios de intercambio ionico, solubilidad y de otros procesos fisicoquimicos. El empleo de radioisotopos de periodo corto obligo a encontrar metodos rapidos para prepararlos y purificarlos, asi como tecnicas especiales para conseguir datos utiles en un tiempo relativamente corto, con frecuencia pocos minutos. La memoria describe algunos de los metodos .recientemente perfeccionados para preparar y purificar isotopos de periodo corto, especialmente los que proceden de materiales irradiados con neutrones, incluso elementos fisionables. Como es natural, estos Ultimos constituyen una materia prima adecuada para obtener toda una serie de radioisotopos de periodo corto muy utiles, como son el {sup 99}Mo, y el {sup 132}Te, y se describen metodos para aislar rapidamente por intercambio ionico estos y otros productos de fision exentos de portador. Tambien se describen metodos para separar elementos descendientes de periodo corto de sus precursores de periodo largo por tecnicas de separacion repetida en las que el precursor se adsorbe fuertemente en sustancias intercambiadoras de iones organicas o inorganicas, y se discuten ejemplos tipicos, como la separacion repetida del {sup 113}In de 1,7 h (a partir de {sup 118}Sn) y del {sup 137}Ba de 2,6 min (a partir de {sup 137}Cs). La memoria describe dos tecnicas que emplean indicadores de periodo corto para efectuar estudios quimicos. La primera es la de lecho compacto, que sirve para medir rapidamente la solubilidad de sales poco solubles previamente marcadas. Se citan algunos resultados relativos a la solubilidad del LaF{sub 3} en soluciones de HCl y HClO{sub 4}, obtenidos recientemente por este metodo. La segunda constituye un metodo rapido para medir coeficientes de difusion en sistemas liquidos. Consiste en saturar fritas delgadas de porcelana con una solucion que contenga un radioisotopo que se eluye despues rapidamente con una solucion no marcada. A partir de la disminucion del indice de recuento de la frita en funcion del tiempo, se pueden calcular los coeficientes de difusion de otros productos despues de calibrar con una sustancia cuya velocidad de difusion sea conocida. Como el recorrido de difusion es muy corto, es posible realizar las mediciones en un tiempo mucho mas breve por este metodo que por las tecnicas clasicas, por ejemplo, las celdas con diafragma o los metodos que emplean tubos capilares. (author) [Russian] Radioizotopy mnogih jelementov shiroko ispol'zujutsja v Okridhskoj nacional'noj laboratorii dlja izuchenija ionnogo obmena, rastvorimosti i pri drugih fiziko-himicheskih issledovanijah. Ispol'zovanie korotkozhivushhih izotopov v takih issledovanijah obuslovilo neobhodimost' razrabotki ne tol'ko bystryh metodov prigotovlenija i ochistki radioizotopov, no i special'nyh metodov poluchenija sootvetstvujushhej informacii v sravnitel'no korotkoe vremja, chasto v techenie neskol'kih minut. Opisyvajutsja nekotorye, nedavno razrabotannye metody poluchenija i ochistki korotkozhivushhih izotopov, v chastnosti izotopov, poluchaemyh pri nejtronnom obluchenii materialov, v tom chisle rasshhepljajushhihsja jelementov. Poslednie, bezuslovno, javljajutsja nadezhnymi istochnikami rjada poleznyh ksrotko- zhivushhih izotopov, naprimer, Mo{sup 99} i Te{sup 132}. Opisyvajutsja yetody bystrogo vydelenija jetih izotopov s pomoshh'ju ionnogo obmena, a takzhe metody otdelenija korotkozhivushhih dochernih izotopov ot ishodnyh dolgozhivushhih izotopov s pomoshh'ju special'noj tehniki vydelenija (''doenija'') kogda ishodnyj izotop bystro adsorbiruetsja na organicheskih i neorganicheskih ionoobmennyh materialah. Obsuzhdajutsja takzhe tipichnye sluchai, naprimer, vydelenie In{sup 113} s periodom poluraspada 1,7 chasa (iz Sn{sup 113}) i Va{sup 137} s periodom poluraspada 2,6 min (iz Sv{sup 137}). Opisyvajutsja dva vida primenenija korotkozhivushhih indikatorov v himicheskih issledovanijah. Vo- pervyh, metod 'uplotnennogo sloja' dlja bystrogo izmerenija rastvorimosti umerenno rastvorimyh solej, mechennyh indikatorami. Privodjatsja nekotorye novye dannye, poluchennye s pomoshh'ju jetogo metoda, v otnoshenii rastvorimosti LaF{sub 3} v rastvorah HCl i HClO{sub 4}. Vo-vtoryh, opisan bystryj metod izmerenija kojefficientov diffuzii v zhidkih sistemah. Tonkie poristye farforovye fritty nasyshhajutsja rastvorom, soderzhashhim radioizotop, zatem bystro promyvajutsja rastvorom, ne soderzhashhim indikatory. Kojefficienty diffuzii mogut byt' rasschitany iz umen'shenija skorosti scheta fritta s techeniem vremeni posle sravnenija s materialom s izvestnoj skorost'ju diffuzii. Blagodarja korotkomu sroku diffuzii, s pomoshh'ju jetogo metoda izmerenija mogut byt' provedeny za znachitel'no bolee korotkoe vremja, chem s pomoshh'ju obychnyh metodik, naprimer, s pomoshh'ju kamery s diafragmoj ili kapilljarnyh trubok. (author)}
place = {IAEA}
year = {1963}
month = {Mar}
}